Lewmar's high performance Control Blocks
are extremely lightweight and have
unprecedented load bearing capacity. The
weight advantage comes from a combination
of MRT (Metal Replacement Technology) and
stainless steel central race and balls. Long
Fibre Technology provides you with
exceptional strength and durability. Plus, the
open design allows you to easily flush out
sand and salt, which keeps maintenance
simple and your entire operation running a lot
smoother.

These blocks are specifically designed for
hand held loads, they achieve maximum
efficiency at maximum hand load.